Start at the iliac crest (the top of your hipbone that you can feel like a shelf on the side of your body). From this level on your spine, measure to the C7 vertebrae, the knobby bone at the base of your neck when you put your head down. Make sure to keep your back straight while having the measurement taken.

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Description

A versatile and well-designed pack.

From quick overnight hikes to weekend excursions into the wilderness, the Osprey Atmos AG 50 Backpack will get you where you want to be, without your back aching every inch of the way. Now featuring Osprey's Anti-Gravity suspension system, this award-winning pack is even more comfortable than before. You might be thinking an Anti-Gravity system sounds like it belongs on a spaceship rather than a backpack, but really the system is pretty simple and is composed of a single lightweight mesh panel that extends from the top of the back to the hip. This seamless design allows the panel to automatically contour to the shape of your back, while also allowing air to pass between your back and pack for a cool and comfortable fit.

An adjustable torso length along with an adjustable hip belt allows you to further customize the pack for your hiking comfort. Fully equipped for full days on the trail, the Atmos comes standard with a removable/floating lid that doubles as day or summit hip pack. An internal hydration sleeve lets you equip the pack with the hydration system of your choice, while two stretch side pockets can be used to stash gear or water bottles. Two front panel pockets are an ideal spot to stow maps, extra layers, and snacks, and multiple gear loops on the front of the back allow you to attach your ice axe and trekking poles.

Hike like a Pro

Been on the trail pretty regularly and i've tried a lot of packs, including super minimal 30L pack hikes with just the essentials all the way up to tons of luxury items. This pack appeals to me on many levels, because whatever your style this pack can do it. THis bag is designed to be a one-size fits all for style. No major specialization, but it can do a lot pretty darn well.

Its a light pack, with every feature I could want and easily the most comfy i've ever used. Definitely need to make sure you size and adjust it appropriately. If your not sure, look online for instructions and videos on how to adjust a pack.

Pros: Super adjustable Amazingly comfy AG system light for the features it has Removable top is great for weekend hikes that don't come close to filling the pack

It was a bit large for a 3 day hike, so i removed the top. But I feel like it would be perfect for a week long hike. Less for cold weather, but i dont really do that much anymore.

Cons: I'm a pocket guy, so the one giant duffel scenario isnt as appealing to me. But thats the trend. wish the removable lid was held on with clips so you dont have to undo straps every time Only major thing it should have is a built in pack cover. This is not a cheap bag at all, so needing to buy a $30 cover on top of it is a little crappy. Price - not a cheap pack, and if you do your research you can likely find a pack equally nice for less. But the Osprey name is gonna cost ya.

Comment on Sam Lodise's review »

Would anyone be able to confirm availability of size L in Cinnabar or perhaps Graphite Grey? I'm interested in a backpack in the 50-55L range to complement my Aether 60, which is great for colder weather camping. However, it's a bit too large for warmer weather camping. My tent, pad and bag for 40+_degree nights is approaching the lighter end: they only weigh 6 lbs combined. So I am interested in this pack - a size Large shows to be 53L, which is perfect. A 45L pack is a tad small for any food/water for a weekend of backpacking trip, but fine for an overnight trip or where I can readily access water sources on the hike with a filtration system. Thanks, Marc

Pack it up

Comment on Dan Be's photo »

Over engineered?

Familiarity:
I've used it several times

First off I want to thank Osprey for hooking me up with this awesome pack! You guys and gals rock!!

As most anyone who backpacks will know, Osprey has been making some of the best packs on the market for years now. They never seem to disappoint. Yet again, Osprey has somehow figured out a way to improve their pack designs. The major improvement with this pack is the "AG" or Anti Gravity suspension system. Seriously, this system seems to make the pack feel lighter than it really is. The large mesh panel on the back panel allows tons of airflow, while still being supportive enough for carrying loads up to 40lbs. Once you have the pack on you hardly notice it's there! The suspension system does an incredible job at distributing the weight, making the pack feel more stable in rough terrain.

The waist belt is the best waist belt I have used. It, along with the AG suspension system helps to distribute the weight of the load very well, allowing you to hike longer without feeling fatigued. The pack also offers cinch straps which help to keep the load in place, so the pack doesn't shift on you when you are maneuvering through large rocks or uneven terrain. The pockets are well thought out, making access to water bottles and snacks a breeze. The top pocket also removes so you can use it for short day hikes. And the large mesh stretch panel on the back works perfectly when you need just a little more room for a few items, or the trash you are packing out.

If I didn't know any better, I would assume this pack was German engineered. If you are in the market for a great pack, to fill the need for overnight up to 3 or 4 day backpacking trips, look no further.

Comment on Dan Be's review »

Great pack, love the 'AG'

I used this pack a few times now and it's pretty good. Features are good but the best part is the 'Anti Gravity' suspension. Not only is it the most comfortable pack I've worn but the mesh is extremely breathable adding to the comfort. I'd buy another without hesitation. In fact I have the 50 and I'm considering adding the 65!

Depends on how much you like to carry. If you are lightweight oriented and try to find ways to lighten the load the 50 will work. If you like to bring a lot of extra gear and be really comfortable bump up the pack size. For some this would be more than enough on 2-3 days others, no way.

Hey there, Leta, the Osprey rep chiming in - Right on, Bill. It really depends on your gear. The good thing about going bigger is that you don't HAVE to fill it, although the bad thing about going bigger is that you probably WOULD fill it! You will love the pack, though!

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Amazing Pack

Familiarity:
I've used it several times

I've used this pack a couple times now and it is by far the best, most comfortable pack I have ever worn. It has a great amount of room for 2 or 3 day treck and if packed right maybe a day more. The organization inside the pack is phenomenal. Unlike most small packs it has a sleeping bag compartment that fit mu bag and a pack pillow. The adjustable hood on the pack also allows for you to stuff the pack and still keep the lid on. The single piece netting built into back keeps your back totally breathable and a huge sweat ball like usual. All in all its an amazing pack and deserves the backpackers choice award that it has.